do beyblades rust/corrode? if they do how can I prevent it without damaging my bey?

They don't rust, they just turn grey, they're die cast metal.
Also, use the Ask a Question, Get an Answer! Thread next time

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Probably back for real.

This should have gone in "Ask a question, get an answer", but I'll answer it here-

While beyblades do corrode, it does not significantly affect performance; they just turn a boring, dull shade of grey. The only way to prevent corrosion is to paint your beyblade, or apply some kind of clear seal, though you can't do anything that will affect the weight of the bey.

EDIT: D'oh! Beaten!

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Threads and combos!

Spoiler (Click to View)

[LTD] MF Jade Horogium 85RSF
[LTD] RB / RSF Attack
[LTD] Ronin Genbull (Crystal Up) 85RF
MF-H Phantom (Attack) Cancer 85RB
MSF-H Wyvang Ifraid GB145RF {Alternative to Wyvang^2 with more Upper Attack}
MSF-H Genbull Genbull 85RSF {Improved version of the above Phantom combo}
Balro Begirados 100RF {LTAC with both Upper Smash and regular Smash}
[LTD] MF-H Lightning L-Drago 85RB {more controllable Lightning LTAC}
[LTD] Burn Orion 105SF {Destabilizer}